Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Analysis and Reduction of Crosstalk on Coupled Microstrip tines by Using FDTD Method

  • Pichaya Supanakoon (Department of Information Engineering, Faculty of Engineering, King Mongkut′s Institute of Technology Ladkrabang) ;
  • Monchai Chamchoy (Department of Information Engineering, Faculty of Engineering, King Mongkut′s Institute of Technology Ladkrabang) ;
  • Panarat Rawiwan (Department of Information Engineering, Faculty of Engineering, King Mongkut′s Institute of Technology Ladkrabang) ;
  • Prakit Tangtisanon (Department of Information Engineering, Faculty of Engineering, King Mongkut′s Institute of Technology Ladkrabang) ;
  • Sathaporn Promwong (Department of Information Engineering, Faculty of Engineering, King Mongkut′s Institute of Technology Ladkrabang) ;
  • Teerasilpa Dumwipata (Department of Industrial Electrical Technology, Faculty of Engineering, King Mongkut′s Institute of Technology North Bangkok) ;
  • Takada, Jun-ichi (Graduate School of Science and Engineering, Tokyo Institute of Technology)
  • Published : 2002.07.01
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Abstract

The crosstalk among coupled microstrip lines is the major limiting factors of signal qualities in the high-speed digital and communication equipment. In this paper, a three-dimensional finite difference time domain (FDTD) method is applied to analyze the crosstalk between the coupled microstrip lines. The proposed structures of the coupled microstrip lines are investigated to reduce the coupling in a simple way by modifying their ground plane with an optimum gap. The examples of these structures with the different sizes of the gaps on their ground plane are studied. These structures are considered as the four-port network to evaluate transmission efficiency, near- and far-end crosstalk. Gaussian pulse is excited to evaluate the frequency characteristics from dc to 30 ㎓. The transmission efficiency, near- and far-end crosstalk of each structure of the coupled microstrip lines are demonstrated. The numerical results of this study show that the majority of crosstalk is the far-end crosstalk. The usage of the optimum gap on the ground plane can reduce the far-end crosstalk of the coupled microstrip lines while the transmission efficiency is nearly equal.

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